JPH08240807A - 液晶表示パネルのシール方法 - Google Patents
液晶表示パネルのシール方法Info
- Publication number
- JPH08240807A JPH08240807A JP4532495A JP4532495A JPH08240807A JP H08240807 A JPH08240807 A JP H08240807A JP 4532495 A JP4532495 A JP 4532495A JP 4532495 A JP4532495 A JP 4532495A JP H08240807 A JPH08240807 A JP H08240807A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- sealant
- sealing
- liquid crystal
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
Abstract
ールマージンを減らすことなくシール工数を低減させる
ことを目的とする。 【構成】 ディスペンサによるシール剤の供給をシール
マージンの大きな位置を始点および終点として行うと共
に、シール形成をコーナ部における点打ちと、この点打
ち位置を結ぶ線引き操作とから構成する。
Description
置精度よく液晶表示パネルをシールする方法に関する。
とるものと、アクティブマトリックス方式をとるものが
あり、用途により使い分けされているが、大型の装置に
は薄膜トランジスタ(TFT)をそれぞれの画素に備え
たアクティブマトリックス方式をとるものが用いられて
いる。
m で硼硅酸ガラスなどよりなる二枚のガラスを基板と
し、この内の一枚にゲートバスライン,データバスライ
ン,画素電極などをマトリックス状にパターン形成し、
他の一枚に共通電極などをパターン形成した後、パター
ン形成面を内側とし、スペーサにより微小間隔を保持し
た状態で対向せしめ、この間に液晶を注入すると共に、
ガラス基板の周辺部をエポキシ樹脂などの封止剤により
封止して形成されている。
晶表示パネルを構成する一方の表示基板1の周辺領域に
シール剤2を液晶の注入口3を除いてループ状に塗布し
た後、対向するガラス基板をスペーサにより微小間隔を
保つ状態に保持して硬化せしめ、これを液晶溜めに浸漬
して液晶を真空注入した後に封口する方法がとられてい
る。然し、この方法は真空排気に多くの時間を要し、ま
た、その後にパネルの洗浄を必要とすると云う問題があ
る。
狭いことから、真空排気に当たって空気抵抗が大きく、
例えば、10インチ相当の基板では排気に数時間を要し、
また、封止処理後に基板に付着している液晶を洗浄しな
ければならず、液晶の無駄も多い。そこで、この問題を
解決する方法として液晶を基板に滴下し、上下の基板を
真空中にて貼り合わせる真空滴下注入法が提案されてい
る。
ては、スクリーン印刷法に代わってディスペンサを用い
て接着剤を基板に塗布する方法が一般に使用されてい
る。そこで、ディスペンサを用いて基板に接着剤を塗布
した後に基板に液晶を滴下し、二枚の基板を精度よく位
置合わせしてシールする技術を確立する必要がある。
されている一方の基板の周辺部にディスペンサを用いて
接着剤を塗布し、閉ループを一筆書きで描く場合には始
点と終点が存在するが、シールの信頼性を向上させるた
めには多少なりとも始点と終点とを重ねる(Overlap)必
要があり、その重なり位置では接着剤の量が他の位置よ
りも多くなることから、両基板を加圧して接合する際に
横方向にシール幅が増加すると云う問題があり、そのた
めシールマージンを大きくとる設計が必要となり、ま
た、シール部のパターン精度が低下すると云う問題があ
る。
せることが課題である。
広いシールマージンが許される場合はシールの一筆書き
をどの位置から始めてもよいが、広いシールマージンが
許されない場合は、 四隅の内の何れかの隅から一筆書きを始めること、 四隅に予めシール剤の点打ちを行い、ディスペンサ
により点打ち位置を結んで線引きすること、の何れかの
方法をとることで解決することができる。
型化が求められており、特殊な場合を除き、シールマー
ジンを広くとることは設計の上で許されていない。こゝ
で、シールマージンはシール位置と基板端面(設計上の
切断位置)との距離を指している。
が最も大きいことに着目してなされたものである。すな
わち、図3に示す従来のように注入口を備えたシールを
ディスペンサを用いて形成する場合や、スクリーン印刷
法で閉ループ状のシールを形成する場合には問題がない
が、一筆書きで閉ループを描く場合には信頼性保持のた
めに始点と終点とが一部重複することは避けられず、そ
のため、スペーサを介して二枚の基板を接着させる際に
重複部の接着剤が拡がるのは止むを得ない。
部分はシールマージンがシールの直線位置に較べると遙
かに大きい。図1は表示基板1の左下隅5を一筆書きの
始点および終点としてシール6を形成した場合で、二枚
の基板を接着させ、硬化させた状態ではシール剤は拡が
るが、コーナ部であるためシールマージンへの影響は少
ない。
として本発明は、コーナ部に同じシール材料を用いて予
め点打ちを行っておき、ディスペンサで点打ち間を繋ぐ
方法をとるものである。図2はこれを示すもので、表示
基板1の四隅にシール剤で点打ち7を行い、これをシー
ル剤2で結ぶもので、この際、ディスペンサで線引きを
行う場合に点打ち7の位置でシール剤2の重複が生じる
がコーナ部であることからシールマージンへの影響は事
実上少ない。
ファー用の点打ち部として使用するものである。すなわ
ち、液晶表示パネルにおいて、カラーフィルタを備えた
共通電極基板は端子接続を行うために導電性樹脂などを
用いてアクティブマトリックスがパターン形成されてい
るTFT基板と回路接続されているが、本発明において
は、点打ち7を導電性のシール材料で形成し、この位置
からTFT基板上に設けてある共通電極パッドに回路接
続を行うものである。
とは信頼性の観点から同種の材料で作る必要があり、そ
のため、点打ち7用としてはシール剤2に導電性を付与
した材料を使用することが好ましい。
コーナ部を使用することによりパターン精度を高め、ま
た、シールマージンの増大を防ぐものである。
ィルタ基板を用いてシールを行った。
ール剤(長瀬チバ製T−470 )を使用した。また、スペ
ーサとしては密着性を有する粒径が5.0 μm ( 早川ゴム
製)を使用し、TFT基板に散布した後、150 ℃に加熱
して密着させた。
を用い、コーナ部を始点および終点としてシール剤を線
引きして閉ループを形成した後、200mg の液晶(品名,Z
L-14792,メルク製)をこの基板に滴下し、TFT基板と
共に貼り合わせ装置にセットして真空排気を行った。
間に亙って排気を行った後、セパレータを除去し、両基
板を対向密着状態とした後、真空を破って加圧させた。
次に、大気中に取り出した基板のシール部のみに紫外光
を約5000mJ/cm2のエネルギーで照射してシール剤を硬化
させた。
好な液晶表示パネルを得ることができた。また、このよ
うにして得たパネルのシールマージンは液晶を注入口よ
り真空含浸して後に封口する従来のものと同等であり、
シールマージンを増やす必要は無かった。 実施例2:カラーフィルタ基板の四隅に紫外線硬化型の
シール剤(長瀬チバ製T−470 )を使用して加圧した状
態で直径が1 mm となる点打ちを行った後、ディスペン
サを用いてシール剤を線引きし、閉ループを形成した。
ネルを形成したが、再現性が良く、電気的特性も良好
で、シールマージンは従来のものと同等であり、シール
マージンを増やす必要は無かった。 実施例3:シール剤として直線部の線引き用としては紫
外線硬化型のシール剤(長瀬チバ製T−470 )に径が7.
6 μm のファインバースペーサ(日本電気硝子製)を0.
5wt %混合したものを用い、また、共通電極から取り出
すトランスファ材料としては紫外線硬化型のシール剤
(長瀬チバ製T−470 )に導電性スペーサ(Ni被覆,粒
径7.6 μm , 積水ファインケミカル製) を5wt%混合し
たものを用いた。粘度は両者共に約50,000 cp である。
ンスファ材料をディスペンサで点打ちを行った後、直線
部は3kg/cm2の圧力でシール剤を10 mm / 秒の速さで線
引きして閉ループのシールを形成した。
表示パネルを形成したが、トランスファは接触抵抗が数
Ω以下で完全に導通しており、電気的特性も良好で、シ
ールマージンは従来のものと同等であり、シールマージ
ンを増やす必要は無かった。
示パネルに液晶を真空含浸させるのに長時間を要すると
云う問題と、含浸後の洗浄処理が不要となり、これによ
りコスト低減に寄与することができる。
ある。
図である。
る。
Claims (4)
- 【請求項1】 表示部がパターン形成してある一方の基
板の周辺部に、ディスペンサによりシール剤を供給して
閉ループ状をしたシール部を作り、該基板上に液晶を滴
下した後に真空排気を行い、他方の基板を位置合わせし
て当接した状態でシール剤を硬化させるシール形成方法
において、 前記ディスペンサによるシール剤の供給をシールマージ
ンの大きな位置を始点および終点として行うことを特徴
とする液晶表示パネルのシール方法。 - 【請求項2】 前記シールマージンの大きな位置が基板
のコーナ部であることを特徴とする請求項1記載の液晶
表示パネルのシール方法。 - 【請求項3】 前記のシール形成がコーナ部における点
打ちと該点打ち位置を結ぶ線引き操作とからなることを
特徴とする請求項1記載の液晶表示パネルのシール方
法。 - 【請求項4】 前記の点打ちがトランスファ形成用であ
ることを特徴とする請求項3記載の液晶表示パネルのシ
ール方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04532495A JP3534474B2 (ja) | 1995-03-06 | 1995-03-06 | 液晶表示パネルのシール方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04532495A JP3534474B2 (ja) | 1995-03-06 | 1995-03-06 | 液晶表示パネルのシール方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08240807A true JPH08240807A (ja) | 1996-09-17 |
JP3534474B2 JP3534474B2 (ja) | 2004-06-07 |
Family
ID=12716138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP04532495A Expired - Lifetime JP3534474B2 (ja) | 1995-03-06 | 1995-03-06 | 液晶表示パネルのシール方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3534474B2 (ja) |
Cited By (123)
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---|---|---|---|---|
JPH10301122A (ja) * | 1997-04-25 | 1998-11-13 | Matsushita Electric Ind Co Ltd | 液晶表示素子の製造方法 |
KR20010098943A (ko) * | 2000-04-27 | 2001-11-08 | 구사마 사부로 | 전기 광학 장치의 제조방법, 실재 압착 경화 장치, 전기광학 장치 및 전자 기기 |
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